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package homomorphism.set;

import org.apache.hadoop.io.Writable;

/**
 *
 * @author liuyu
 */
public abstract class SetHomomorphism<T1 extends Writable,T2 extends Writable> implements SetHomomorphismInterface <T1,T2>{

    public abstract T2 filter(T1 val) ;

    public abstract T2 plus(T2 a, T2 b);

}
